| 摘要 |
The radiotelephone demodulates the information received from the base station. The symbol-energy-to-noise-density (Es/No) is estimated over a specified duration. This estimate is compared to a target Es/No value. The target is updated periodically in order to maintain the quality of service. If the measured Es/No is greater than the target, the radiotelephone sends a power down command over a reverse power control signaling channel to the base station. If the measured Es/No is less than the target, the radiotelephone sends a power up command to the base station over the same channel. A multi-carrier transceiver system for a code division multiple access system includes circuitry for up-converting processed user data to a plurality of frequency channels. The transceiver, in some embodiments, further includes a plurality of antennas for transmitting each channel of user data. A method of using the multi-carrier system includes processing user data, and then transmitting the data at different frequency channels, and when necessary, transmitting the data through different antennas separated in space and/or having orthogonal polarization.
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